net: use WARN_ON_ONCE() in sk_stream_kill_queues()

sk_stream_kill_queues() has three checks which have been
useful to detect kernel bugs in the past.

However they are potentially a problem because they
could flood the syslog.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/stream.c b/net/core/stream.c
index 06b36c7..ccc083c 100644 (file)
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -196,13 +196,13 @@ void sk_stream_kill_queues(struct sock *sk)
        __skb_queue_purge(&sk->sk_receive_queue);
 
        /* Next, the write queue. */
-       WARN_ON(!skb_queue_empty(&sk->sk_write_queue));
+       WARN_ON_ONCE(!skb_queue_empty(&sk->sk_write_queue));
 
        /* Account for returned memory. */
        sk_mem_reclaim_final(sk);
 
-       WARN_ON(sk->sk_wmem_queued);
-       WARN_ON(sk->sk_forward_alloc);
+       WARN_ON_ONCE(sk->sk_wmem_queued);
+       WARN_ON_ONCE(sk->sk_forward_alloc);
 
        /* It is _impossible_ for the backlog to contain anything
         * when we get here.  All user references to this socket